OpenAI GPT-4o API Token Cost Calculator
Simulate daily burn rates and 30-day cloud billing for OpenAI’s flagship GPT-4o model ($2.50 input / $10.00 output per 1M).
Parameters & Config
Pre-configured official API pricing for this specific model tier
Prompt payload size including system prompt, user prompt, and chat history
Generated output tokens returned by the model
Total API requests processed per day across all users
Cost per 1,000,000 incoming prompt tokens
Cost per 1,000,000 generated completion tokens
Estimated 30-day cloud billing based on current traffic and model selection
Average daily API infrastructure expenditure incurred
Key Metrics & Sub-Totals
3 itemsCalculation Summary & Unit Breakdown
| Metric | Calculated Value | Notes / Logic |
|---|---|---|
| Active Model Configuration | GPT-4o (OpenAI Flagship • $2.50 / $10.00) | - |
| Daily Request Volume | 3,000 | queries/day |
| Tokens per Request | 2,000 | Prompt: 1,500 / Output: 500 |
| Daily Token Burn | 6,000,000 | tokens/day |
| Monthly Total Tokens | 180,000,000 | 30-day projection |
| Daily Average Infrastructure Cost | $26.25 | USD |
| Monthly Prompt (Input) Token Cost | $337.50 | USD |
| Monthly Completion (Output) Token Cost | $450.00 | USD |
| Total Projected Monthly Cloud Bill | $787.50 | USD |
Overview & Methodology
OpenAI’s GPT-4o is the flagship multimodal intelligence model offering 128k context and high output velocity. Billed at $2.50 per 1M input tokens and $10.00 per 1M output tokens, prompt caching can discount cached input tokens by 50% down to $1.25/1M.
Mathematical Formulation
Single Request Cost = (Input Tokens / 1M × $2.50) + (Output Tokens / 1M × $10.00). Monthly Cost = Single Cost × Daily Requests × 30.Optimization Best Practices
Utilize prompt caching on static system prompts exceeding 1,024 tokens to cut prompt cost by 50%.
Instruct GPT-4o to return structured JSON without conversational preambles to minimize output token consumption.
Use model routing: send simple classification tasks to GPT-4o mini and reserve GPT-4o for complex multi-step reasoning.
Frequently Asked Questions
Q.How much does 1,000 GPT-4o API calls cost with 1.5k input / 500 output tokens?
1,000 calls consume 1.5M input tokens ($3.75) and 0.5M output tokens ($5.00), totaling $8.75 ($0.00875 per request).
Q.What is the discount for GPT-4o prompt caching?
Prompt caching provides a 50% discount on cached input tokens ($1.25 per 1M tokens vs $2.50 standard).
Q.What is the maximum output token limit on GPT-4o?
GPT-4o supports generating up to 16,384 completion tokens in a single response.